It's at times like this (and only times like this, for a very short duration) that I kind of wish I was a lawyer, because the idea that it's even possible for a court to force a dozen different companies to buy ads from like this one specific company's service sounds ridiculous to me but I don't actually know for sure whether it is.
Like you'd think these companies have "free speech rights" to buy ads or not buy ads from whomever they want, but X says it has a "free speech right" to force other companies to buy ads from it. I don't know how that works.